Fontaine Fifth Wheel Ultra LT Service Manual

Transcription

1 Fontaine Fifth Wheel Ultra LT Service Manual Fontaine Fifth Wheel 7574 Commerce Circle Trussville, AL LT-156 August 2010

2 Ultra LT Contents Identify your fifth wheel Slides and brackets Pre-service procedures Preventive maintenance Uncoupling design Troubleshooting Rebuild Disassembly Assembly Identify fifth wheel assembly Identify top plate Indentifying features: Fabricated pull handle Slide assemblies have centermounted air cylinders Name tags located on front skirt Ultra LT Series Identify slides and brackets (Note: see Slides and Bracket section for more information) Inboard Outboard Inboard models will be available in the future Adjustable plate mount

3 Identify your fifth wheel Serial number locations Serial number engraved directly into the right of fifth wheel skirt. Note: position 5 and 6 of the serial number indicates the year built. Part number nomenclature Fontaine Fifth Wheel complete assembly part numbers. Example: SL4LWO Top plate 2. Mounting bracket 3. Slide rail SL Release 4 Top plate model LWO Mounting bracket 6750 Mounting height 12 Slide travel SL = Side left SR = Side right AA = Air actuated 4 = Ultra LT Series LWO = Outboard slide bracket APB = Adjustable plate bracket Pending release: LWI = Inboard slide bracket SMB = Stationary bracket mount Actual height from truck frame to top of fifth wheel. Examples: 6750 = 6-3/4" 7750 = 7-3/4" 8750 = 8-3/4" A36 = Angle mount For sliding fifth wheels only. Example: 12 = 12" slide 24 = 24" slide 36 = 36" slide 48 = 48" slide Duty class restrictions Application/restriction levels Standard duty: Fifth Wheel must be used in a 100% on-highway application, with more than 30 miles between each stop. The total number of towed axles equals two (2). Road type must be maintained concrete or asphalt. Gross Combination Weight (GCW) is less than 95,000 lbs or 43,000 kgs. See Fontaine Application Guide LT-076 for specific application recommendations. Product used in unapproved applications voids manufacture warranty. Moderate duty: Fifth Wheel must be used in a less than 10% off-highway application, with no minimum mileage between each stop. The maximum total number of towed axles equals four (4). Road type must be maintained concrete, asphalt, gravel, or crushed rock. Gross Combination Weight (GCW) is less than 115,000 lbs or 52,000 kgs. See Fontaine Application Guide LT-076 for specific application recommendations. Product used in unapproved applications voids manufacture warranty. Severe duty: Fifth Wheel can be used in any off-highway application, with no minimum mileage between each stop. The total number of towed axles equals five (5) or more. All road types are acceptable including hard packed dirt and non-maintained roads. Gross Combination Weight (GCW) is more than 115,000 lbs or 52,000 kgs. See Fontaine Application Guide LT-076 for specific application recommendations. Product used in unapproved applications voids manufacture warranty. Important application notes: 1. If any single restriction factor within your application is surpassed within a given duty level, the next duty level must be selected. 2. When selecting a fifth wheel, if the application or vehicle usage places the maximum capacity on a certain fifth wheel, then the selection of a fifth wheel with a higher capacity is advised. For example, a tractor that is at a maximum vertical load of 50,000 lbs in a moderate duty application should be using a fifth wheel with a vertical load capacity of 55,000 lbs or greater. This additional capacity should give better service life over a longer period of time. 3. All logging, mining, oil field and similar applications are considered severe duty. Do not select assemblies in the standard or moderate levels when a special application is designated

4 Fontaine Ultra LT Series Slides and Brackets LWO: Outboard slide Up to 50 lbs lighter than competitive outboard slide systems 4 slide increments give you slide versatility for improved payload distribution Compact design with central mounted air cylinder Booted air cylinder provides protection to shaft Available in 6-3/4", 7-3/4", 8-3/4" and 9-3/4" heights; 12, 16", 24, 36 and 48 slide travel LWO weight chart Slide Height Length 6-3/4" 7-3/4" 8-3/4" 9-3/4" 12" 356 lbs 361 lbs 367 lbs 373 lbs 16" 363 lbs 368 lbs 374 lbs 380 lbs 24" 376 lbs 381 lbs 387 lbs 393 lbs 36" 396 lbs 401 lbs 407 lbs 413 lbs 48" 416 lbs 421 lbs 427 lbs 433 lbs Add 5 lbs for air actuation LWO parts list 6 10 Item no. Description Part no. Qty Slide rail 1 2 Rear slide stop 2 3 Slide bracket 1 4 Bracket bushing BSH Air cylinder * 1 6 Locking wedge 2 7 Hex bolt, 3/8"-16 x 1-1/4", gr5 * 2 8 Spacer bushing * 2 9 Hex lock nut, 3/8"-16, gr5 * 2 10 Flat washer, 1/2" 2 11 Hex head bolt, 1/2"-13 x 1" 2 * Included in LWO/LWI air cylinder kit, part no.: CYL-LWO-LWI

5 Fontaine Ultra LT Series Slides and Brackets APB: Adustable plate mount LT top plate with the ABP bracket is the lightest mounting system available for the LT family Manufactured with the durability and costeffectiveness of steel construction Brackets are welded to a 3/8" steel plate with six 5/8" bolt holes on each side for mounting versatility Plate has different cut out and different locations for rear rocker limit blocks Available in 6-1/4", 7-1/4", 8-1/4" and 9-1/4" heights APB weight chart Height 6-1/4" 7-1/4" 8-1/4" 9-1/4" 281 lbs 286 lbs 291 lbs 297 lbs

6 Pre-service procedures Always check for damage due to improper handling or delivery practices prior to starting recommended pre-service procedure. A. Fasteners Make sure all nuts and bolts are in place and properly tightened. Check all welds for cracks, breaks or separation. Check to see if both bracket pins are in place and secured by retainer pins and cotter pins. See Figure A and B. Figure A Figure B Cotter pin Retainer pin Bracket pin B. Lubrication 1. Tilt the top plate forward (front of the fifth wheel down) and apply grease to each bearing area through the zerk fitting located on each side of the top plate just to the front of the bracket pins. Continue to apply grease until it is coming out of the back of the bearing. It may be necessary to raise the rear of the fifth wheel with a pry bar to open up the pocket slightly and allow the grease to flow through. Periodically remove the fifth wheel to clean old grease from the bracket grease channels to help insure an even distribution of fresh grease. A substantial amount of grease may be required initially to fill the reservoir. Tilt the wheel to the rear (rear of the wheel down) and repeat the procedure. Rock the top plate back and forth several times to spread the grease over the bearing surface. Inspect the trailer kingpin plate and top surface of the fifth wheel to make sure each is properly greased. A liberal coating of grease should be applied to the complete surfaces of both the trailer kingpin plate and the top surface of the fifth wheel. A paddle or brush will make this job easier. Do not use a lube plate (high density polyethylene) on top of the fifth wheel or kingpin bolster plate in lieu of grease without prior approval by Fontaine. The additional thickness of this material can prevent the proper operation of the fifth wheel and can cause a dangerous condition. 2. Lubricate the fifth wheel lock prior to opening and closing. Referring to Figure C, grease the jaw and lockbar (wedge) on top and bottom. Separate the jaw and lockbar (wedge) with a large screwdriver and distribute the grease along the full length of the jaw and lockbar (wedge) mating surfaces. Open and close the fifth wheel several times to further distribute the grease. Figure C Grease fitting Grease fitting Jaw Separate jaw and wedge grease full length Wedge

7 Pre-service procedures Fontaine suggests the use of a moly-based lubricant such as Mobilgrease XHP320 or equivalent when applying lubricant to the locking jaw and wedge. Lightly oil other moving parts in the fifth wheel (areas or regions that experience extreme and/or prolonged freezing temperatures should consider using a less viscous substance such as: 90-weight oil, diesel fuel, kerosene, motor oil, etc. Fontaine suggests contacting your specific lubricant manufacturer for guidelines on mixing compatibility of any lubricant). 3. For sliding ffth wheels, lightly oil the locking mechanism. Operate the mechanism several times to ensure it is functioning properly. 4. Grease the top plate. Spread grease all over the mating surface of the top plate. Be sure the grease pockets built into the top plates are full of grease. Note: This lock is set from the factory with some running slack based on a two inch kingpin. If a kingpin is less than nominal diameter but within tolerance of SAE 1955 the amount of slack will increase. No attempt should be made to reduce the slack on smaller diameters kingpins as it would result in failure to close properly around a nominal kingpin diameter. The adjustment stud can not be used as knock-out rod! If the fifth wheel is not properly adjusted the wheel will be very difficult to open. Once the wheel is opened the adjustment procedure should be followed by installing a 2" kingpin and the adjustment stud should receive 2-1/2 turns after contact with the lock bar. C. Operation 1. Fontaine s Ultra LT fifth wheel opens by a straight pull on the release handle until maximum opening stroke is achieved then is moved slightly forward until the handle cut out sets up on the handle block located on the fifth wheel skirt. 2. Close the locking mechanism using a test kingpin or 2" (50.8 mm) diameter pipe. Repeat several times making sure that all moving parts have adequate lubrication. 3. The pull handle grip should always be free of grease or any substance which could prevent a firm grip, causing the handle to slip and possibly resulting in injury. 4. Fontaine s air actuated Ultra LT fifth wheel is shown in Figure D. A release valve located on the dash or in a lock box mounted on the rear of the cab is used to activate the release cylinder. To open, set the tractor parking brake and pull the release valve. Hold the valve open until the locking mechanism is locked in the open position. The pull valve will not activate the air cylinder unless the tractor parking brakes are set. Figure D

8 Pre-service procedures Lubrication points: (Ultra LT) Black arrows are lube points when the fifth wheel is on a mount. However, for proper maintenance it is recommended you clean it and re-grease the pivot points... see white arrows. Jaw and wedge (see preservice and lubrication)

9 Preventive maintenance Remember to exercise extreme caution, follow all stated & customary safety procedures, and be sure to wear safety glasses. Step 1. Visual inspection Using a suitable solvent, degrease the fifth wheel and mounting brackets every 90 days or 30,000 miles and inspect for: 1. Cracks in the fifth wheel assembly, mounting brackets, and mounting parts. 2. Wear and/or damage to moving parts. 3. Correct operation of the secondary lock. 4. Loose nuts and bolts in the fifth wheel and in the mounting hardware. 5. Securely fastened and properly working springs. 6. Check to see if both bracket pins are in place and secured by retainer pins and cotter pins. 7. Check the locking jaw. If dimension X is less than 0.8" (20.25 mm) replacement of the jaw and lockbar (wedge) is required. See Figure A. Figure A Dimension X Step 2. Function Inspection Begin with the fifth wheel in the unlocked position. Pull handle to unlock fifth wheel if it is not open. Insert a test kingpin, such as Fontaine Kingpin Tool KIT-ULTRA-KP, to close the lock. Make sure the jaw and wedge are engaged behind the kingpin and the pull handle is fully retracted. Open and close the wheel again. If the action is slow or sluggish, it may be due to a build up of old grease or a bent part causing binding (see trouble shooting section). Lightly lubricate the pivot points on the mechanism with a spray lubricant. Step 3. Adjustment 1. With the wheel in the closed position, loosen the adjuster lock nut and turn the adjuster stud counter clockwise (outward) until it is free from touching the end of the lockbar (wedge). 2. Insert a test kingpin or 2" (50.8 mm) diameter shaft to ensure the locking mechanism is completely closed. 3. Turn the adjuster stud clockwise (inward) until it contacts the end of the lockbar (wedge). Now turn the adjuster stud clockwise (inward) an additional 2-1/2 revolutions. This will give the recommended.02" (0.525 mm) running clearance. 4. Tighten the adjuster lock nut. Improper adjustment can cause the mechanism to bind and/or wear prematurely. Check the fifth wheel operation and adjustment. Using a test kingpin or 2" (50.88 mm) diameter pipe, follow the instructions provided in the pre-service procedure on pages

10 Preventive maintenance Step 4. Lubrication Lubrication recommended every 6 weeks or 15,000 miles. Follow the instructions provided in the lubrication pre-service procedures on pages 6-7. Special precautions must be taken during cold weather to ensure that the Fontaine Ultra LT locking mechanism operates freely. Ice and sludge can built up and lubricants become thick and binding at low temperatures. In areas or regions that experience extreme and/or prolonged freezing temperatures, Fontaine recommends use of a cleaner or degreaser on the latching mechanism, making sure that the moving parts operate freely. This should be followed by an application of 90-weight oil, diesel fuel, kerosene, motor oil, etc. to all moving parts. This procedure may also be necessary in operations where excessive road grime or grit is encountered. The regular performance of the routine, "90-Day/30,000 mile preventative maintenance procedure," is also recommended

11 Uncoupling design Lockbar Adjustment stud Lockbar (wedge) is stopped by the adjustment stud. Springs apply constant pressure to hold the wedge tight against the stud. Proper adjustment allows the wedge from becoming wedged behind the jaw. First pull of the handle rotates the secondary lock to clear the secondary lock stop Handle is pulled until notch is free to be placed on the latch catch block on the handle plate (not shown). Trailer holds the kingpin the jaw in the fifth wheel. There is a portion of the lockbar that is in the throat of the fifth wheel. As trailer pulls the kingpin away from the stationary jaw, the rotating jaw moves. The kingpin then contacts the lockbar that is the throat

12 Uncoupling design As trailer continues to pull the kingpin out of the fifth wheel, jaw rotates until it hits stop on cover plate. The kingpin pushes the lockbar allowing the notch to become free of the lock catch. The springs rotate the handle away from the lock catch allowing the fifth wheel to become set-up for the next couple. Fifth wheel is ready to couple. There is some portion of the lockbar in the throat of the fifth wheel. Visual lock indicators Fifth wheel is not closed since handle notch is not over the handle plate. Fifth wheel is locked as shown by the handle notch being over the handle plate

13 Troubleshooting Hard to open Ultra LT Hard to close Ultra LT NO Will the pull handle move? YES NO While coupling, does handle retract at all? YES Check for obstruction hitting between fifth wheel and mounting base. Check for obstruction hitting between fifth wheel and mounting base. Make sure fifth wheel is in open position. Check for interference between top plate and base mount. Check kingpin for proper dimension. Check kingpin for proper dimension. Make sure kingpin is at correct height. Check for correct adjustment setting. Check for proper rotation of secondary lock. Do not over tighten. Check for damaged pull handle spring. Check for bent pull handle and/or operating handle base. Check tip of rotating jaw to see if worn, broken or bent. Check for proper lubrication. Check for damaged components such as pull handle, operating handle, cover plate, rotating locking jaw and secondary lock spring. Finish or call Fontaine Parts Connection. Check kingpin to see if bent or worn. Check to see if operating handle spring or pull handle rotating jaw spring is missing or damaged. Check to see if cover plate is bent or broken. Finish or call Fontaine Parts Connection

14 Troubleshooting Excessive slack Ultra LT Will not latch open Ultra LT NO Set adjustment rod to proper setting. NO Is adjustment rod set correctly? YES Check for bent operating handle and/or pull handle. Check for bent or damaged cover plate and/or rotating locking jaw. Check for bent or damaged pull handle spring, operating handle spring and/or rotating jaw spring. Finish or call Fontaine Parts Connection. Is the wheel completely closed? YES Is adjustment rod set correctly? YES Set adjustment rod to proper setting. Check for kingpin wear. Check rotating locking jaw and wedge for wear. Check for bent or damaged cover plate and/or rotating locking jaw. Finish or call Fontaine Parts Connection. NO NO Check for interference between top plate and mount or other lower frame obstruction. Have you checked for interference between wheel and base mount? Check for missing or damaged operating handle, pull handle or rotating jaw springs. Check for bent pull handle, operating handle or cover plate. Check for worn or broken rotating lock jaw. Check for excessive wear on pull handle notch and/or fifth wheel latch block. YES Check for proper orientation of pull handle and secondary lock. Make sure pull handle bolt is not too tight. Finish or call Fontaine Parts Connection

15 Troubleshooting Air Actuated coupling problems Ultra LT NO Is the wheel closing properly? YES Remove air cylinder and check for damage - i.e. bent shaft, exterior housing or broken internal spring. Check air supply line for damage (crushed or crimped). Check air cylinder port and/or relief valve hole for obstruction. Check air cylinder for leakage. NO Is air supply line crushed or crimped? NO Is air cylinder installed properly? YES Finish or call Fontaine Parts Connection. Replace air line. Remove air cylinder and check for damage i.e. bent shaft, exterior housing or broken internal spring. Finish or call Fontaine Parts Connection

16 Rebuild Inspect fifth wheel for damage Before rebuilding check to make sure that there are no cracks in the crossmembers or other components. Under no circumstances should a fifth wheel be repaired or used if any component (cross member, saddle bearing, etc.) is cracked. Also check for excessively worn areas. Items needed for rebuild (follow rebuild instructions included in the LT-147) Remember to exercise extreme caution, follow all stated and customary safety procedures, and be sure to wear safety glasses. Top plate rebuild kit KIT-RPR-UL-L Do not use pneumatic tools. Over-tightening may cause damage. 15/16" wrench 3/4" socket wrench Pliers Flat head screw driver Long pry bar Test kingpin KIT-ULTRA-KP Kingpin gauge MSC-GAUGE Moly-based lubricant such as Mobilgrease XHP320 or equivalent After inspection you may need to optionally order other kits. See schematic on page18. Special tools Fontaine offers special tools for your fifth wheel to help your repairs go fast and easy. KIT-ULTRA-KP Kingpin gauge MSC-GAUGE

17 Rebuild Ultra LT series part identification Cover plate not shown for clarity. Bracket liner Jaw spring Main springs Pivot pin Pivot pin clip Hex head bolt & lock nut Pull handle Adjustment rod Adjustment rod nut Rotating locking jaw Locking wedge Operating handle Pivot pin clip Pivot pin short

18 Rebuild Repair kit (KIT-RPR-UL-L) Item Description Quantity 7 Pivot pin, long 1 20 Pivot pin, short 1 25 Lock nut, 5/8" Main spring 2 27 Jaw spring 1 28 Rotating locking jaw 1 29 Pivot pin clip 2 30 Locking wedge 1 32 Washer, 3/4" 1 33 Cotter Pin 1 Spring kit (KIT-SPR-ULHH) 26 Main spring 2 27 Jaw spring 1 Adjuster rod kit (KIT-ROD-UL) 1 Adjustment rod 1 2 Adjustment rod nut 1 Secondary lock kit (KIT-SEC-ULHH-L) Item Description Quantity 15 Lock nut, 1/2" Washer, 1/2" 1 17 Bushing, 5/16" 1 19 Hex head bolt, 5/8"-11 x 1.75" 1 21 Secondary lock 1 22 Hex head bolt, 1/2"-13 x 1.5" 1 23 Spacer bushing 1 24 Washer, flat 5/8" 1 25 Lock nut, 5/8"-11 1 Operating lever kit (KIT-OPR-UL) 19 Hex head bolt, 5/8"-11 x 1.75" 1 20 Pivot pin, short 1 23 Spacer bushing 1 24 Washer, flat 5/8" 1 25 Lock nut, 5/8" Operating handle 1 32 Washer, 3/4" 1 33 Cotter Pin 1 Air cylinder kit (KIT-AA-UL-L) Item Description Quantity 8 Lock nut, 1/2" Exhaust valve 1 Quick disconnect (not pictured) 1 10 Hex head bolt, 1/2"-13 x 1.75" 1 11 Air cylinder 1 12 Lock nut, 3/8" Washer, 3/8" 1 14 Shoulder bolt, 3/8" Main spring 1 Mounting pin kit (KIT-PIN-UL) 3 Bracket pin 2 5 Bracket retainer pin 2 6 Cotter pin 2 Bracket bushing (not pictured) 2 Pull handle kit (KIT-PUL-UL-L) 15 Lock nut, 1/2" Washer, 1/2" 1 17 Bushing, 5/16" 1 18 Pull handle 1 22 Hex head bolt, 1/2"-13 x 1.5"

19 Disassembly Cover plate removed for clarity. Refer to exploded view of assembly on page 18 to identify item number and parts. Degrease fifth wheel before installing new parts 1. Set the fifth wheel in the closed position To set the fifth the wheel in the closed position, rotate the jaw towards the front of the fifth wheel with a screw driver of adequate length to keep hands and fingers out of the throat of the wheel. This will partially close the wheel. Now pull out on the pull handle a small amount and complete the rotation of the jaw toward the front of the wheel. Allow the pull handle to go in slowly for the wheel to completely close. 2. Remove the jaw spring Remove the jaw spring (item 27). Now remove the main spring (item 26) from the pull handle. Remove the main spring (item 26) from the operating handle. Main springs (26) Pull handle Rotate jaw counter-clockwise toward the front of wheel Jaw spring (27) 3. Remove the lock nut, flat washer, spacer and hex nut Remove the 5/8"-11 lock nut, flat washer and spacer (items 23, 24 & 25) and 5/8"-11 hex head bolt (item 19) which secures the secondary lock latch (item 21) to the operating handle (item 31). Hex head bolt is captured inside the secondary lock. Secondary lock (21) Lock nut, washer, and spacer (23), (24), (25) Remove the pivot pin clip/pin Remove the cotter pin (item 33) from the pivot pin (item 20) and washer (item 32) which attaches the operating handle (item 31) to the locking 20 wedge (item 30). Cotter pin (33) Operating handle (31) Locking wedge (30) Operating handle (31)

20 Disassembly Cover plate removed for clarity. Refer to exploded view of assembly on page 18 to identify item number and parts. 5. Remove the operating handle and locking wedge Remove the operating handle (item 31) and locking wedge (item 30) by pulling the operating handle to the open position. This will allow you to remove the operating handle from the wedge. Remove the wedge (item 30) and short pivot pin (item 20). Turn the adjustment rod (item 1) counter clockwise (outward) until it has moved about 2" from starting position. This will eliminate interference when removing and installing the locking jaw. Pivot pin (20) Remove the pull handle and secondary lock. Remove the 1/2 hex head bolt, spacer bushing, washer and 17 lock nut (items 15, 16, 17 & 22) which secures the secondary lock latch (item 21) to the pull handle. Remove the pull handle and secondary lock. Pull handle (18) Rotate adjustment rod (1) 2" from starting position Locking wedge (30) 7. Remove the rotating locking jaw Operating handle (31) Remove the pivot pin clip (item 29) from the long pivot pin (item 7). Raise the top plate and remove the long pivot pin (item 7) that secures the rotating locking jaw (item 28). Remove the rotating locking jaw. 7 Pivot pin clip (29) and pivot pin (7) 29 Rotating locking jaw (28) 28 Secondary lock (21)

21 Assembly Refer to exploded view of assembly on page 18 to identify item number and parts. Adequate lubrication should be used 1. Insert rotating locking jaw Insert the rotating jaw (item 28) after applying a light coating of grease. Note: Insert the jaw so that the hole in the cover plate lines up with the hole in the rotating jaw. Raise the fifth wheel and then insert the long pivot pin (item 7) into the fifth wheel and then into the rotating jaw. Note: Make sure the notched portion of the pivot pin is inserted into the fifth wheel first. Secure the pivot pin in place with a new pivot pin clip (item 29). Rotating locking jaw (28) Insert the pull handle and secondary lock Insert the pull handle. After applying a light coat of grease to the pivot points, insert the secondary lock latch (item 21) into the fifth wheel. Attach the pull handle to the secondary lock latch using the 1/2 hex head bolt, spacer bushing, washer and new lock nut (items 15, 16, 17 & 22) Pull handle (18) Pivot pin clip (29) and pivot pin (7) 3. Insert wedge, and handle Insert the new short pivot pin (item 20) into the locking wedge (item 30) after applying a light coat of grease. Insert the locking wedge into the wheel. Move the locking wedge in behind the rotating locking jaw (item 28) to verify operation. Now slide the locking wedge back toward the outside of the wheel. This will assist in installing the operating handle. Insert the end of the operating handle (item 31) into the slot at the bottom of the fifth wheel and over the locking wedge pivot pin. Rotate the operating handle towards the center of the fifth wheel. This will slide the locking wedge behind the locking jaw. Before rebuilding the assembly, check to make sure that there are no cracks in the crossmembers or other components. Also check bracket pin holes to ensure they are not overly worn (pins should fit snugly). Refer to exploded view of assembly on page 18 to identify item numbers and parts. Pivot pin (20) Rotating locking jaw (28) 20 Locking wedge (30) Secondary lock (21) Operating handle (31)

22 Assembly Refer to exploded view of assembly on page 18 to identify item number and parts. 4. Attach the operating handle to the locking wedge Attach the operating handle (item 31) to the locking wedge using a cotter pin (item 33) and washer (item 32) to secure the connection. Cotter pin (33) Attach the secondary lock latch to the operating handle Attach the secondary lock latch (item 21) to the operating handle (item 31) using the 5/8"-11 hex head bolt (item 19) and new lock nut (item 25) with flat washer and 19 spacer (items 23 & 24). Note the orientation 21 of the bolt (item 19) the threads should be facing up. Secondary lock (21) Lock nut, washer, and spacer (23), (24), (25) Attach springs 7. Adjust fifth wheel Make sure the fifth wheel is completely closed. Attach the jaw spring (item 27) to the rotating locking jaw. Now install main spring (item 26) to the pull handle. Now install the main spring (item 26) to the operating handle. Attach here Locking wedge (30) Main springs (26) Operating handle (31) Open the fifth wheel, insert a 2" kingpin and close the wheel. Turn the adjustment rod (item 1) clockwise (inward) until it contacts the end of the locking wedge. Now turn the adjustment rod clockwise (inward) an additional 2-1/2 complete revolutions. This will give the recommended mm (.02") running clearance. Tighten the adjuster rod jam nut (item 2). The fifth wheel should operate freely and smoothly without binding or interference. Contact plus 2-1/2 turns Operating handle (31) Jaw spring (27) Adjustment rod (1)

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24 Fontaine Fifth Wheel 7574 Commerce Circle Trussville, AL Fax: Fontaine Fifth Wheel LT-156 September 2010 All specifications are subject to change without notice.